hi, all thank you for your help. can someone give me sample rule plz. regards. 2010/9/5 Jan Engelhardt <jengelh@xxxxxxxxxx>: >>> >>>> all is it possible to write a single rule that match source IP or >>>> destination IP. >>> >>> It is possible. >> >>With the "u32" match, I suppose ? > > Ah the language. A linguistic or/and is not the same as a logical > OR/AND. Parenthesis are required in doubt. > > It is possible to write a single rule that matches either src _or_ dst, > _or_ both src addr and dst. Confusion complete! > > u32 does not change that fact. Since rules themselves are ORed so to > speak, there is few reason to do the same between matches (short of > deeper match logic). > It is called disjunctive normal form. > -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html